NCR RealPOS 70 - Page 257

Chapter 12: Cash Drawer Interface 12-17
//////////////////////////////////////////////////////////////////////////////
// CDevice7402::SetState
BOOL SetState( DWORD dwState )
{
// Fire cashdrawer mechanism by setting drawer to the RELEASE State.
// Can't open both cash drawers at the same time. Must set H/W mutex
// in OpenDrawerLIO() around SetState(RELEASE) and SetState(IDLE) to
// insure this.
// To engage solenoid, we must set the solenoid bit HIGH and the ARM bit
// LOW. The ARM bit controls the external arming circuit to drive the
// solenoid.
CString sState;
DWORD bMask;
DWORD sBytes = 0;
DWORD oBytes = 0;
BOOL result = TRUE;
// Read select register
// Solenoid GPIO bits and ARM bit have been set to input when not using.
if ( ReadIOPort(&sBytes, m_nIOPort_select) )
{
// solenoid bits and ARM bit as outputs, Low enables output
sBytes = sBytes & CD7402SELECT_GPO;
result = WriteIOPort( sBytes, m_nIOPort_select );
}
else // Error logged in ReadIOPort
result = FALSE;
if(result)
{
switch( m_nDrawerNumber )
{
case 1:
// set solenoid bit high, arm bit low
bMask = CD7402DRWR1SOLENOID;
break;
case 2:
bMask = CD7402DRWR2SOLENOID;
break;
}
// Read solenoid bit
if ( ReadIOPort(&oBytes, m_nIOPort) )
{
switch (dwState)